CN113178860A - Novel coordination control method for flexible multi-state switch - Google Patents
Novel coordination control method for flexible multi-state switch Download PDFInfo
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- CN113178860A CN113178860A CN202110403408.3A CN202110403408A CN113178860A CN 113178860 A CN113178860 A CN 113178860A CN 202110403408 A CN202110403408 A CN 202110403408A CN 113178860 A CN113178860 A CN 113178860A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/14—Energy storage units
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Abstract
The invention discloses a novel coordination control method for a flexible multi-state switch. The invention comprises the following steps: acquiring power consumption data of high load and weak areas and distribution data of existing equipment in the areas; dividing a transformation area according to the acquired information, dividing a plurality of power supply nodes in the area, and making a plurality of groups of different characteristic increment schemes; calculating the regional transformation priority according to the collected regional power utilization data; carrying out modification cost accounting on each group of power supply nodes in each scheme in the modification area; integrating the data of each scheme assembly, and analyzing the advantages and the defects of each scheme; according to the final data ratio evaluation final construction scheme, the method calculates the regional transformation priority according to the collected regional power utilization data, and can control the cost of the flexible multi-state switch configuration installation and refine the process of the flexible multi-state switch configuration increment by calculating the transformation cost expense based on each group of power supply nodes in each scheme in the transformation region.
Description
Technical Field
The invention relates to the field of flexible multi-state switches, in particular to a novel coordination control method for a flexible multi-state switch.
Background
At present, with the continuous acceleration of urban construction in China and the transformation development of the electric power industry, the traditional distribution network uses safe power supply as the operation of the center of gravity, the control and the development are difficult to be suitable for increasing demands, the electric power produced by a large power plant flows through a high-voltage transmission network and is transmitted to users through a distribution network, the management of the distribution network in the process of transmission points is single, the distribution network is used as a network based on unidirectional power distribution between power supply of a power grid and power consumption of the users, the investment aspect of the distribution network is quite lagged, and the problems that the grid structure of the distribution network is weak, the coverage rate of distribution automation is low, the operation of distribution equipment.
When the flexible multi-state switch is applied to a power distribution network, the flexible closed-loop operation of the power distribution network can be realized, the flexible multi-state switch has a plurality of control modes, the flexible multi-state switch can be used for replacing a conventional switch in a power distribution network to realize flexible interconnection of a system, is one of important directions for upgrading the electronic technology of a power network, has higher manufacturing and application cost under the prior art, is not popularized in a large range under the prior power environment, the method is difficult to be utilized to the maximum under the prior art, is flexible to construct in order to adapt to the continuous upgrade and development of the power network, reliable, efficient distribution network promotes city distribution system's electric energy quality, reliability and operating efficiency, need follow economy, is suitable for, and high-efficient angle constantly fuses current corollary equipment in the power network with emerging technique, needs to combine current switch with flexible switch to carry out the incremental transformation to adapt to the continuous development of distribution network planning construction and operation management.
In order to solve the problems, the application document provides a novel coordination control method for a flexible multi-state switch, which can effectively solve the problems.
Disclosure of Invention
The invention aims to provide a novel coordination control method of a flexible multi-state switch, which is obtained in a numerical mode and solves the problem that the flexible multi-state switch in the prior art is difficult to be utilized to the maximum extent in the prior art.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a novel coordination control method of a flexible multi-state switch, which comprises the following steps;
step S1: acquiring power consumption data of high load and weak areas and distribution data of the existing equipment;
step S2: dividing a transformation area according to the acquired information, dividing a plurality of power supply nodes in the area, and making a plurality of groups of different characteristic increment schemes;
step S3: calculating the regional transformation priority according to the collected regional power utilization data;
step S4: carrying out modification cost accounting on each group of power supply nodes in each scheme in the modification area;
step S5: integrating the data of each scheme assembly, and analyzing the advantages and the defects of each scheme;
step S6: and evaluating the final construction scheme according to the final data ratio.
Preferably: in step S1, the regional power consumption data includes data such as power transmission line saturation, power transmission loss, peak load during peak periods of power transmission, and peak load during low periods of power transmission in the power consumption concentrated region in the cooperative management range, and the existing device distribution data includes devices such as a power transmission range, a power transmission direction, and auxiliary devices such as a transformer station and a distributed distribution station for the existing line.
Preferably: in the step S2, a flexible multi-state switch and corresponding auxiliary equipment are arranged at a power supply node, and main parameters in the characteristic increment scheme are the safety, the load category, the subsequent upgrading capacity, the service life, the maintenance difficulty and other numerical values of the area power distribution network after modification;
the power supply node also comprises at least more than two groups of switches, the switches are at least electrically connected with two groups of power networks with any voltage and a plurality of power grid alternating current ports, and the power networks comprise a plurality of voltage converters;
the power supply node is provided with a distributed power supply to establish a microgrid during normal operation, and the operation mode of the microgrid is divided into a networking mode and an independent mode; the microgrid is accessed to the power network in a networking mode when the power network normally operates, the alternating current and direct current states of power in an alternating current port of the power network are adjusted and converted through the voltage converter, the voltage converter is attached with a filter and a protection device, the bidirectional flow of the power network is controlled through the multiple groups of switches, when the power network fails, the microgrid is switched to an independent mode v/f and operates in a closed loop control mode, the microgrid is powered through the distributed power supply, the fault range is controlled, and the core load in the power network is continuously and stably powered.
Preferably: in step S2, the characteristic incremental solution takes the flexible multi-state switch as a core and combines with the existing equipment to control the peripheral power transmission network, and the accessory equipment includes automated monitoring terminal equipment, a distributed power generation station, and an energy storage device, where:
the automatic monitoring terminal equipment monitors the running state of the power network and transmits data to the cloud end to form a complete information transmission flow;
the distributed power station monitors the quality and performance of regional power in real time in a power network and converts light energy or wind energy to assist in power generation;
the energy storage device stores redundant energy during voltage conversion of the flexible multi-state switch and power generation of the distributed power station, and outputs stored electric quantity during power utilization valley.
Preferably: in step S3, the area transformation priorities are used as the evaluation ratios of the area transformation priorities according to the current area power consumption peak value and power consumption numerical value upper limit ratio, the area power transmission line loss, and the transformed lifting amplitude, wherein:
the ratio of the electricity utilization peak value to the upper limit of the electricity utilization numerical value is used for evaluating the necessity and the urgency of incremental modification of the current area;
the loss of the regional transmission line is used for calculating the energy loss during transmission and voltage transformation and current stabilization before incremental transformation of the current region;
the improvement amplitude after modification judges the necessity of incremental modification based on the improvement degree after statistical current regional incremental modification.
Preferably: in step S5, the evaluation parameters such as safety, load category, subsequent upgrade capacity, modification cost, service life, maintenance difficulty, etc. in each scheme are digitized, the percentage of each parameter in the scheme is divided according to percentage form, multiple rounds of numerical evaluation are performed based on the performance of each parameter of the scheme, the average is taken as the specific score of the parameter, each parameter score is multiplied by the corresponding percentage, and the corresponding score of the scheme is obtained after superposition.
Preferably: in step S6, the final scores of each project are published, and the final construction project is obtained after multiple rounds of manual review.
Preferably: in step S2, the data of the saturation of the power transmission line, the power transmission loss, the maximum load during peak power transmission period, the load during low power transmission period, and the like specifically include the active power, the reactive power, the dc voltage, and the corresponding values of the line switches of each line.
Preferably: in step S2, the characteristic incremental scheme making further includes comparing an incremental plan of a conventional power distribution component with a cost of installing a flexible multi-state switch to obtain an incremental scheme.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through collecting the electricity consumption data of high load and weak areas and the distribution data of the existing equipment in the area, the area which is in urgent need of incremental transformation in the power transmission network can be screened in a targeted manner, and the stability and the reliability of the power network in the area can be improved.
2. According to the method, the reconstruction area is divided according to the acquired information, the power supply nodes are divided in the area, a plurality of groups of increment schemes with different characteristics are formulated, and the increment reconstruction schemes are formulated from multiple angles such as safety, load category, service life, subsequent upgrading capacity, reconstruction cost expense, service life and maintenance difficulty, so that the reconstructed power network can operate stably.
3. According to the method, the regional transformation priority is calculated according to the collected regional power utilization data, the transformation cost accounting is carried out on each group of power supply nodes in each scheme in the transformation region, the cost of the flexible multi-state switch for installation can be controlled, the process of the increment of the flexible multi-state switch is refined, and the power transmission network has high power transmission quality.
4. According to the invention, the advantages and the defects of each scheme are analyzed by integrating the assembly cost data of each scheme, and the final construction scheme is evaluated according to the ratio of the final data, so that the configuration scheme of the flexible multi-state switch can be digitalized, the advantages and the defects of each construction increment scheme can be more intuitively understood, the construction scheme of the flexible power distribution network can be conveniently formulated in the aspect of economic maximum utilization, the electric energy quality, the reliability and the operation efficiency of an urban power distribution system can be improved, and the fluctuation of traditional loads and proportional renewable energy sources can be responded.
5. The invention accesses the automatic monitoring terminal equipment, the distributed power station and the energy storage device in the power network, thereby facilitating the visual management of the power distribution network and the equipment thereof and improving the energy utilization rate in the power network area.
Of course, it is not necessary for any one product that embodies the invention to achieve all of the above advantages simultaneously.
Drawings
FIG. 1 is a schematic flow chart of a novel coordination control method for a flexible multi-state switch according to the present invention;
FIG. 2 is a schematic diagram illustrating a flow of collecting electrical data according to a novel coordination control method for a flexible multi-state switch of the present invention;
FIG. 3 is a schematic diagram illustrating a modification cost accounting process in the novel flexible multi-state switch coordination control method according to the present invention;
FIG. 4 is a schematic diagram of evaluation parameters of a characteristic incremental scheme selection modification scheme in the novel flexible multi-state switch coordination control method of the invention;
fig. 5 is a schematic flow chart of a characteristic increment scheme selection method in the novel flexible multi-state switch coordination control method of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, a novel coordination control method for a flexible multi-state switch according to the present invention includes the following steps;
step S1: acquiring power consumption data of high load and weak areas and distribution data of the existing equipment;
step S2: dividing a transformation area according to the acquired information, dividing a plurality of power supply nodes in the area, and making a plurality of groups of different characteristic increment schemes;
step S3: calculating the regional transformation priority according to the collected regional power utilization data;
step S4: carrying out modification cost accounting on each group of power supply nodes in each scheme in the modification area;
step S5: integrating the data of each scheme assembly, and analyzing the advantages and the defects of each scheme;
step S6: and evaluating the final construction scheme according to the final data ratio.
One specific application of this embodiment is: in step S1, the regional power consumption data includes data such as power transmission line saturation, power transmission loss, maximum load during peak period of power transmission, and load during low peak period of power transmission in the power consumption centralized region in the cooperative management range, and the existing device distribution data includes devices such as power transmission range, power transmission direction, and accessory devices such as transformer stations and distributed distribution stations for the existing line, and the obtained information can facilitate judgment of the transformation region in the region, and can effectively help the transformation potential in the region by collecting information of the existing devices.
In step S2, a flexible multi-state switch and corresponding accessory devices are installed at the power supply node, and the main parameters in the characteristic incremental scheme are the safety, load category, subsequent upgrade capacity, service life, maintenance difficulty and other values of the area power distribution network after modification, and the values are used for evaluating the priority and necessity of incremental modification.
The power supply node also comprises at least more than two groups of switches, the switches are at least electrically connected with two groups of power networks with any voltage and a plurality of power grid alternating current ports, and the power networks comprise a plurality of voltage converters;
the power supply node is provided with a distributed power supply to establish a microgrid during normal operation, and the operation mode of the microgrid is divided into a networking mode and an independent mode; the microgrid is accessed to the power network in a networking mode when the power network normally operates, the alternating current and direct current states of power in an alternating current port of the power network are adjusted and converted through the voltage converter, the voltage converter is attached with a filter and a protection device, the bidirectional flow of the power network is controlled through the multiple groups of switches, when the power network fails, the microgrid is switched to an independent mode v/f and operates in a closed loop control mode, the microgrid is powered through the distributed power supply, the fault range is controlled, and the core load in the power network is continuously and stably powered.
In step S2, the characteristic incremental solution takes the flexible multi-state switch as a core and combines with the existing equipment to control the peripheral power transmission network, and the accessory equipment includes automated monitoring terminal equipment, a distributed power generation station, and an energy storage device, where:
the automatic monitoring terminal equipment monitors the running state of the power network and transmits data to the cloud end to form a complete information transmission flow so as to realize informatization of the power network;
the distributed power station monitors the quality and performance of regional power in real time in a power network, converts light energy or wind energy to assist in power generation, improves the utilization rate of energy in the region, assists in power generation, enables the power to be more economical, and saves later-stage investment cost;
the energy storage stores redundant energy when flexible multi-state switch voltage conversion and distributed power station generate electricity, and the stored electric quantity is output when the electricity consumption is low, so that the pressure on the power grid is reduced, and the utilization of energy is more efficient.
In step S3, the area transformation priorities are used as the evaluation ratios of the area transformation priorities according to the current area power consumption peak value and power consumption numerical value upper limit ratio, the area power transmission line loss, and the transformed lifting amplitude, wherein:
the ratio of the power utilization peak value to the power utilization numerical value upper limit is used for evaluating the necessity and the urgency degree of incremental transformation of the current area and judging whether a flexible multi-state switch needs to be equipped or not;
the loss of the regional power transmission line is used for calculating the loss of energy during transmission and voltage transformation and current stabilization before incremental transformation of the current region and calculating the utilization and improvement efficiency of the transformed energy;
the improvement degree of the improved incremental transformation of the current region after the incremental transformation is counted is used for judging the necessity of the incremental transformation after the transformation, the transformation effect is judged visually, and a data sample is provided for the subsequent transformation.
In step S5, the evaluation parameters such as safety, load category, subsequent upgrade capacity, modification cost, service life, maintenance difficulty, etc. in each scheme are digitized, the percentage of each parameter in the scheme is divided according to percentage form, multiple rounds of numerical evaluation are performed based on the performance of each parameter of the scheme, the average is taken as the specific score of the parameter, the score of each parameter is multiplied by the corresponding percentage, the corresponding score of the scheme is obtained after superposition, and the advantages and disadvantages of each incremental construction scheme are intuitively understood.
In step S6, final scores of all schemes are published, and a final construction scheme is obtained after multiple rounds of manual review, so that the judgment of the final scheme is more reasonable in combination with the actual situation of the site.
In step S2, the data of the saturation of the power transmission line, the power transmission loss, the maximum load during peak power transmission period, the load during low power transmission period, and the like specifically include the corresponding values of the active power, the reactive power, the direct current voltage, and the line switch of each line, so that the operation of the power network in the later period is more stable.
In the step S2, the characteristic increment plan making further includes comparing the increment plans of the traditional power distribution components with the installation cost of the flexible multi-state switch to obtain the increment plan, and the comparison of the two plans provides convenience for the construction of the power grid from the economical and sustainable development perspective.
To the novel coordinated control of flexible many state switch, specifically:
collecting regional power concentrated regional power transmission line saturation, power transmission loss, peak load at peak period of power transmission and load at low peak period of power transmission, power transmission range of existing line, power transmission direction, accessory equipment such as transformer station, distributed distribution station, power utilization peak value and power utilization value upper limit ratio, regional power transmission line loss, lifting amplitude after modification and other related information data, digitizing the configuration scheme of the flexible multi-state switch by using the parameters such as power utilization peak value and power utilization value upper limit ratio, regional power transmission line loss, lifting amplitude after modification, safety, load category, service life, subsequent upgrading capacity, modification cost, service life, maintenance difficulty and the like, and knowing the advantages and disadvantages of each construction increment scheme more intuitively, conveniently making the construction scheme of the flexible power distribution network in the aspect of economic maximum utilization, and improving the power quality of the urban power distribution system, Reliability and operating efficiency, the fluctuation of traditional loads and proportion renewable energy sources, and automatic monitoring terminal equipment is accessed to the power network to visually manage the power distribution network and the equipment.
While the invention has been described in further detail in connection with specific embodiments thereof, it will be understood that the invention is not limited thereto, and that various other modifications and substitutions may be made by those skilled in the art without departing from the spirit of the invention, which should be considered to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. A novel coordination control method for a flexible multi-state switch is characterized by comprising the following steps;
step S1: acquiring power consumption data of high load and weak areas and distribution data of the existing equipment;
step S2: dividing a transformation area according to the acquired information, dividing a plurality of power supply nodes in the area, and making a plurality of groups of different characteristic increment schemes;
step S3: calculating the regional transformation priority according to the collected regional power utilization data;
step S4: carrying out modification cost accounting on each group of power supply nodes in each scheme in the modification area;
step S5: integrating the data of each scheme assembly, and analyzing the advantages and the defects of each scheme;
step S6: and evaluating the final construction scheme according to the final data ratio.
2. The novel coordination control method of the flexible multi-state switch according to claim 1, characterized in that: in step S1, the regional power consumption data includes data such as power transmission line saturation, power transmission loss, maximum load during peak period of power transmission, and load during low peak period of power transmission in the power concentration region in the cooperative management range, and the existing equipment distribution data includes power transmission range and power transmission direction for the existing line, and auxiliary equipment such as a transformer station and distributed substation equipment.
3. The novel coordination control method of the flexible multi-state switch according to claim 1, characterized in that: in the step S2, a flexible multi-state switch and corresponding accessory equipment are arranged at the power supply node, and parameters in the characteristic increment scheme are the safety, load category, subsequent upgrade capacity, service life and maintenance difficulty values of the modified regional power distribution network;
the power supply node also comprises at least more than two groups of switches, the switches are at least electrically connected with two groups of power networks with any voltage and a plurality of power grid alternating current ports, and the power networks comprise a plurality of voltage converters;
the power supply node is provided with a distributed power supply to establish a microgrid during normal operation, and the operation mode of the microgrid is divided into a networking mode and an independent mode; the microgrid is accessed to the power network in a networking mode when the power network normally operates, the alternating current and direct current states of power in an alternating current port of the power network are adjusted and converted through the voltage converter, the voltage converter is attached with a filter and a protection device, the bidirectional flow of the power network is controlled through the multiple groups of switches, when the power network fails, the microgrid is switched to an independent mode v/f and operates in a closed loop control mode, the microgrid is powered through the distributed power supply, the fault range is controlled, and the core load in the power network is continuously and stably powered.
4. The novel coordination control method of the flexible multi-state switch according to any one of claims 1 and 3, characterized in that: in step S2, the distinctive incremental solution takes the flexible multi-state switch as a core and combines the existing devices to control the peripheral power transmission network, and the accessory devices include an automation monitoring terminal device, a distributed power generation station, and an energy storage device, where:
the automatic monitoring terminal equipment monitors the running state of the power network and transmits data to the cloud end to form a complete information transmission flow;
the distributed power station monitors the quality and performance of regional power in real time in a power network and converts light energy or wind energy to assist in power generation;
the energy storage device stores redundant energy during voltage conversion of the flexible multi-state switch and power generation of the distributed power station, and outputs stored electric quantity during power utilization valley.
5. The novel coordination control method of the flexible multi-state switch according to claim 1, characterized in that: in the step S3, the area transformation priority is used as a selection ratio of the area transformation priority according to the current area power utilization peak value and power utilization numerical value upper limit ratio, the area power transmission line loss and the transformation lifting amplitude, wherein:
the ratio of the electricity utilization peak value to the upper limit of the electricity utilization numerical value is used for evaluating the necessity and the urgency of incremental modification of the current area;
the loss of the regional transmission line is used for calculating the energy loss during transmission and voltage transformation and current stabilization before incremental transformation of the current region;
the improvement amplitude after modification judges the necessity of incremental modification based on the improvement degree after statistical current regional incremental modification.
6. The novel coordination control method of the flexible multi-state switch according to claim 1, characterized in that: in step S4, the modification cost accounting includes symmetric land acquisition cost, labor cost, material cost, mechanical cost, patent cost, and time cost calculation, so as to obtain the cost required by modification of each power supply node.
7. The novel coordinated control method of the flexible multi-state switch according to any one of claims 1, 6 and 3, is characterized in that: in step S5, parameters in each scheme, such as safety, load category, subsequent upgrade capacity, modification cost, service life, and maintenance difficulty, are digitized, the percentage of each parameter in the scheme is divided according to percentage, multiple rounds of numerical evaluation are performed based on the performance of each parameter in the scheme, the average is taken as the specific score of the parameter, the scores of each parameter are multiplied by the corresponding percentage, and the corresponding score of the scheme is obtained after superposition.
8. The novel coordination control method of the flexible multi-state switch as claimed in claims 1 and 7, characterized in that: in the step S6, the final scores of the schemes are published, and the final construction scheme is obtained after multiple rounds of manual review.
9. The novel coordination control method of the flexible multi-state switch according to claim 1, characterized in that: in step S2, the data of the saturation of the power transmission line, the power transmission loss, the maximum load during the peak period of power transmission, and the load during the low peak period of power transmission specifically include the active power, the reactive power, the dc voltage, and the corresponding values of the line switches of each line.
10. The novel coordination control method of the flexible multi-state switch according to claim 1, characterized in that: in the step S2, the characteristic incremental scheme making further includes comparing an incremental plan of a conventional power distribution component with a cost of installing a flexible multi-state switch to obtain an incremental scheme.
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